<template>
    <div class="login_container">
        <div class="login_box">
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <el-form  ref="loginFormRef" label-width="0" class="login_form" :model="loginForm" :rules="loginFormRules">
                    <el-form-item prop="username">
                        <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
                    </el-form-item>
                    <el-form-item prop="password">
                        <el-input prefix-icon="iconfont icon-3702mima" v-model="loginForm.password"></el-input>
                    </el-form-item>
                    <el-form-item class="btns">
                        <el-button type="primary" @click="login()">登录</el-button>
                      <el-button type="info" @click="resetLoginForm()">重置</el-button>
                      </el-form-item>
            </el-form>
        </div>
    </div>
</template>
<script>
export default {
    data() {
    return {
      loginForm: {
        username: 'admin', 
        password: '123456'
      },
      // 这是表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法 都是element ui里面的规则
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' }, 
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
      resetLoginForm(){
          this.$refs.loginFormRef.resetFields();
      },
      login(){
          this.$refs.loginFormRef.validate( async valid=>{if (!valid) {return;}
            const {data:res} = await this.$http.post("login",this.loginForm); //解构返回值
            if (res.meta.status==200) {
                this.$message.success('登录成功');
                window.sessionStorage.setItem('token',res.data.token);
                this.$router.push('/home');
                }
                else{
                return this.$message.error('登录失败');
            }
           
        
          }//登录前的预校验函数
          )}
  }
}
</script>
<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100%;
}
.login_box{
    background-color: #fff;
    height: 300px;
    width: 450px;
    border-radius: 13px;
    position:absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
}
.avatar_box{
    height: 130px;
    width: 130px;
    padding: 10px;
    box-shadow: 0 0 10px #ddd ;
    img{
        background-color: #eee;
        height: 100%;
        width: 100%;
        border-radius: 50%;
    }
    border: solid #eee;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
}
.btns{
    float: right;
}
.login_form{
    position: absolute;
    bottom: 0px;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
</style>